90% of illnesses or diseases can be traced from the food intake that we eat. Hereditary issues can be blamed because children eat the same food as the parents, hence Doctors perhaps would claim the disease is hereditary. Yes, there is a high propensity towards the illnesses but if you change what you eat you can change the overall effect especially if you are young.
If you take the same route as your parents did eat the same food definitely you will fall into the same trap. Perhaps we can get some feedback from other whether they share the same experience or not.